Filter for the constuction of good facets based in the chi2 fit. More...

#include <Chi2FacetFilter.h>

Inheritance diagram for Chi2FacetFilter:

Public Types
using	Object = AObject
	Type of the object to be analysed.

using	Interface = Filter< AObject >
	Mark this class as the basic interface.

Public Member Functions
	Chi2FacetFilter ()
	Constructor with the default chi2 cut value and width parameter.

	Chi2FacetFilter (double chi2Cut, double penaltyWidth)
	Constructor using given chi2 cut value and width parameter.

void	exposeParameters (ModuleParamList *moduleParamList, const std::string &prefix) final
	Expose the set of parameters of the filter to the module parameter list.

void	initialize () final
	Initialise the parameter caches before the processing starts.

Weight	operator() (const CDCFacet &facet) final
	Main filter method returning the weight of the facet Returns NAN if the cell shall be rejected.

virtual bool	needsTruthInformation ()
	Indicates if the filter requires Monte Carlo information.

virtual Weight	operator() (const Object &obj)
	Function to evaluate the object.

Weight	operator() (const Object *obj)
	Function to evaluate the object.

virtual std::vector< float >	operator() (const std::vector< Object * > &objs)
	Function to evaluate a vector of objects Base implementation applies the function to each object.

void	beginRun () override
	Receive and dispatch signal for the beginning of a new run.

void	beginEvent () override
	Receive and dispatch signal for the start of a new event.

void	endRun () override
	Receive and dispatch signal for the end of the run.

void	terminate () override
	Receive and dispatch Signal for termination of the event processing.

Protected Member Functions
void	addProcessingSignalListener (ProcessingSignalListener *psl)
	Register a processing signal listener to be notified.

int	getNProcessingSignalListener ()
	Get the number of currently registered listeners.

Private Types
using	Super = BaseFacetFilter
	Type of the super class.

Private Attributes
std::vector< double >	m_param_chi2CutByISuperLayer {75.0}
	Parameter : The chi2 cut values distinguished by superlayer.

double	m_param_penaltyFactor = 120.0 / 75.0
	Parameter : The chi2 cut values distinguished by superlayer.

std::array< double, ISuperLayerUtil::c_N >	m_chi2CutByISuperLayer {}
	Memory for the chi2 cut values distinguished by superlayer.

std::array< double, ISuperLayerUtil::c_N >	m_penaltyWidthByISuperLayer {}
	Memory for the chi2 cut values distinguished by superlayer.

std::vector< ProcessingSignalListener * >	m_subordinaryProcessingSignalListeners
	References to subordinary signal processing listener contained in this findlet.

bool	m_initialized = false
	Flag to keep track whether initialization happend before.

bool	m_terminated = false
	Flag to keep track whether termination happend before.

std::string	m_initializedAs
	Name of the type during initialisation.

Detailed Description

Filter for the constuction of good facets based in the chi2 fit.

Definition at line 27 of file Chi2FacetFilter.h.

Member Typedef Documentation

◆ Interface

using Interface = Filter<AObject>

inherited

Mark this class as the basic interface.

Definition at line 38 of file Filter.dcl.h.

◆ Object

using Object = AObject

inherited

Type of the object to be analysed.

Definition at line 35 of file Filter.dcl.h.

◆ Super

using Super = BaseFacetFilter

private

Type of the super class.

Definition at line 31 of file Chi2FacetFilter.h.

Constructor & Destructor Documentation

◆ Chi2FacetFilter() [1/2]

Chi2FacetFilter ( )

Constructor with the default chi2 cut value and width parameter.

Definition at line 25 of file Chi2FacetFilter.cc.

  : m_param_chi2CutByISuperLayer{35.0, 75.0, 75.0, 75.0, 75.0, 75.0, 75.0, 75.0, 75.0}
{
}

◆ Chi2FacetFilter() [2/2]

Chi2FacetFilter	(	double	chi2Cut,
		double	penaltyWidth
	)

Constructor using given chi2 cut value and width parameter.

Definition at line 31 of file Chi2FacetFilter.cc.

  : m_param_chi2CutByISuperLayer{chi2Cut}
  , m_param_penaltyFactor(penaltyWidth / chi2Cut)
{
}

Member Function Documentation

◆ addProcessingSignalListener()

void addProcessingSignalListener ( ProcessingSignalListener * psl )

protectedinherited

Register a processing signal listener to be notified.

Definition at line 55 of file CompositeProcessingSignalListener.cc.

{
  m_subordinaryProcessingSignalListeners.push_back(psl);
}

◆ beginEvent()

void beginEvent ( )

overridevirtualinherited

Receive and dispatch signal for the start of a new event.

Reimplemented from ProcessingSignalListener.

Definition at line 31 of file CompositeProcessingSignalListener.cc.

{
  Super::beginEvent();
  for (ProcessingSignalListener* psl : m_subordinaryProcessingSignalListeners) {
    psl->beginEvent();
  }
}

◆ beginRun()

void beginRun ( )

overridevirtualinherited

Receive and dispatch signal for the beginning of a new run.

Reimplemented from ProcessingSignalListener.

Reimplemented in LayerRelationFilter< AFilter >, FourHitFilter, QualityIndicatorFilter, ThreeHitFilter, TwoHitVirtualIPFilter, TwoHitVirtualIPQIFilter, RecoTrackStorer, ROIFinder, SpacePointLoaderAndPreparer, and TrackCandidateResultRefiner.

Definition at line 23 of file CompositeProcessingSignalListener.cc.

{
  Super::beginRun();
  for (ProcessingSignalListener* psl : m_subordinaryProcessingSignalListeners) {
    psl->beginRun();
  }
}

◆ endRun()

void endRun ( )

overridevirtualinherited

Receive and dispatch signal for the end of the run.

Reimplemented from ProcessingSignalListener.

Definition at line 39 of file CompositeProcessingSignalListener.cc.

{
  for (ProcessingSignalListener* psl : reversedRange(m_subordinaryProcessingSignalListeners)) {
    psl->endRun();
  }
  Super::endRun();
}

◆ exposeParameters()

void exposeParameters	(	ModuleParamList *	moduleParamList,
		const std::string &	prefix
	)

finalvirtual

Expose the set of parameters of the filter to the module parameter list.

Reimplemented from Filter< AObject >.

Definition at line 37 of file Chi2FacetFilter.cc.

{
  Super::exposeParameters(moduleParamList, prefix);
 
  moduleParamList->addParameter(prefixed(prefix, "chi2CutByISuperLayer"),
                                m_param_chi2CutByISuperLayer,
                                "Acceptable chi2 values by superlayer id",
                                m_param_chi2CutByISuperLayer);
 
  moduleParamList->addParameter(prefixed(prefix, "penaltyFactor"),
                                m_param_penaltyFactor,
                                "Factor for cut value to obtain the width used in translation from chi2 values to weight penalties",
                                m_param_penaltyFactor);
}

◆ getNProcessingSignalListener()

int getNProcessingSignalListener ( )

protectedinherited

Get the number of currently registered listeners.

Definition at line 60 of file CompositeProcessingSignalListener.cc.

{
  return m_subordinaryProcessingSignalListeners.size();
}

◆ initialize()

void initialize ( )

finalvirtual

Initialise the parameter caches before the processing starts.

Reimplemented from ProcessingSignalListener.

Definition at line 53 of file Chi2FacetFilter.cc.

{
  Super::initialize();
  if (m_param_chi2CutByISuperLayer.size() == 1) {
    for (int iSL = 0; iSL < ISuperLayerUtil::c_N; ++iSL) {
      m_chi2CutByISuperLayer[iSL] = m_param_chi2CutByISuperLayer[0];
      m_penaltyWidthByISuperLayer[iSL] = m_param_chi2CutByISuperLayer[0] * m_param_penaltyFactor;
    }
  } else if (m_param_chi2CutByISuperLayer.size() == ISuperLayerUtil::c_N) {
    for (int iSL = 0; iSL < ISuperLayerUtil::c_N; ++iSL) {
      m_chi2CutByISuperLayer[iSL] = m_param_chi2CutByISuperLayer[iSL];
      m_penaltyWidthByISuperLayer[iSL] = m_param_chi2CutByISuperLayer[iSL] * m_param_penaltyFactor;
    }
  } else {
    B2ERROR("Expected chi2CutByISuperLayer to be of length 1 or "
            << ISuperLayerUtil::c_N
            << " received "
            << m_param_chi2CutByISuperLayer.size());
  }
 
}

◆ needsTruthInformation()

bool needsTruthInformation

virtualinherited

Indicates if the filter requires Monte Carlo information.

Reimplemented in MCSymmetric< BaseAxialSegmentPairFilter >, MCSymmetric< BaseFacetFilter >, MCSymmetric< BaseFacetRelationFilter >, MCSymmetric< BaseSegmentPairFilter >, MCSymmetric< BaseSegmentPairRelationFilter >, MCSymmetric< BaseSegmentRelationFilter >, MCSymmetric< BaseSegmentTripleFilter >, MCSymmetric< BaseSegmentTripleRelationFilter >, MCSymmetric< BaseTrackRelationFilter >, OnVarSet< Filter< ATruthVarSet::Object > >, OnVarSet< Filter< AVarSet::Object > >, OnVarSet< BaseFacetFilter >, OnVarSet< BaseFacetRelationFilter >, OnVarSet< BaseAxialSegmentPairFilter >, OnVarSet< BaseSegmentRelationFilter >, OnVarSet< BaseTrackRelationFilter >, and OnVarSet< BaseSegmentPairRelationFilter >.

Definition at line 46 of file Filter.icc.h.

    {
      return false;
    }

◆ operator()() [1/4]

Weight operator() ( const CDCFacet & facet )

final

Main filter method returning the weight of the facet Returns NAN if the cell shall be rejected.

Definition at line 75 of file Chi2FacetFilter.cc.

{
  constexpr const int nSteps = 1;
  const double chi2 = FacetFitter::fit(facet, nSteps);
 
  ISuperLayer iSL = facet.getISuperLayer();
  if (chi2 > m_chi2CutByISuperLayer[iSL] or std::isnan(chi2)) {
    return NAN;
  } else {
    // Introducing a mini penilty to distiguish better facets.
    double penalty = std::erf(chi2 / m_penaltyWidthByISuperLayer[iSL]);
 
    // Good facet contains three points of the track
    // the amount carried by this facet can the adjusted more realistically
    return 3 - penalty;
  }
}

◆ operator()() [2/4]

Weight operator() ( const Object & obj )

virtualinherited

Function to evaluate the object.

Base implementation accepts all objects.

Parameters

obj	The object to be accepted or rejected.

Returns: A finite float value if the object is accepted. NAN if the object is rejected.

Reimplemented in SeedChargeCDCPathFilter, SizeCDCPathFilter, ArcLengthBasedCDCfromEclPathPairFilter, ArcLengthBasedCDCPathPairFilter, Chi2BasedCDCPathPairFilter, DistanceBasedCDCPathPairFilter, DuplicateCDCPathPairFilter, HitDistanceBasedCDCPathPairFilter, MCTruthCDCPathPairFilter, DistanceCDCStateFilter, ExtrapolateAndUpdateCDCStateFilter, MCTruthCDCStateFilter, MCTruthEclSeedFilter, RoughCDCfromEclStateFilter, RoughCDCStateFilter, FiveHitFilter, FourHitFilter, QualityIndicatorFilter, ThreeHitFilter, TwoHitVirtualIPFilter, TwoHitVirtualIPQIFilter, SimplePXDStateFilter, AllPXDStateFilter, ResidualSVDStateFilter, SimpleSVDStateFilter, AllSVDStateFilter, and RelationFilter< AObject >.

Definition at line 52 of file Filter.icc.h.

    {
      return 1;
    }

◆ operator()() [3/4]

Weight operator() ( const Object * obj )

inherited

Function to evaluate the object.

Base implementation accepts all objects, except nullptr.

Parameters

obj	The object to be accepted or rejected.

Returns: A finit float value if the object is accepted. NAN if the object is rejected. Nullptr is always rejected.

Definition at line 58 of file Filter.icc.h.

    {
      return obj ? operator()(*obj) : NAN;
    }

◆ operator()() [4/4]

std::vector< float > operator() ( const std::vector< Object * > & objs )

virtualinherited

Function to evaluate a vector of objects Base implementation applies the function to each object.

Can be optimized for MVA filters

Parameters

objs	A vector of pointers to objects

Returns: A vector of float or NAN values. See above

Definition at line 64 of file Filter.icc.h.

    {
      std::vector<float> out;
      for (const auto& obj : objs) {
        out.push_back(operator()(obj));
      }
      return out;
    }

◆ terminate()

void terminate ( )

overridevirtualinherited

Receive and dispatch Signal for termination of the event processing.

Reimplemented from ProcessingSignalListener.

Reimplemented in StereoHitTrackQuadTreeMatcher< Belle2::TrackFindingCDC::HyperHough >, StereoHitTrackQuadTreeMatcher< Belle2::TrackFindingCDC::QuadraticLegendre >, and StereoHitTrackQuadTreeMatcher< Belle2::TrackFindingCDC::Z0TanLambdaLegendre >.

Definition at line 47 of file CompositeProcessingSignalListener.cc.

{
  for (ProcessingSignalListener* psl : reversedRange(m_subordinaryProcessingSignalListeners)) {
    psl->terminate();
  }
  Super::terminate();
}

Member Data Documentation

◆ m_chi2CutByISuperLayer

std::array<double, ISuperLayerUtil::c_N> m_chi2CutByISuperLayer {}

private

Memory for the chi2 cut values distinguished by superlayer.

Definition at line 63 of file Chi2FacetFilter.h.

◆ m_initialized

bool m_initialized = false

privateinherited

Flag to keep track whether initialization happend before.

Definition at line 52 of file ProcessingSignalListener.h.

◆ m_initializedAs

std::string m_initializedAs

privateinherited

Name of the type during initialisation.

Definition at line 58 of file ProcessingSignalListener.h.

◆ m_param_chi2CutByISuperLayer

std::vector<double> m_param_chi2CutByISuperLayer {75.0}

private

Parameter : The chi2 cut values distinguished by superlayer.

Definition at line 56 of file Chi2FacetFilter.h.

◆ m_param_penaltyFactor

double m_param_penaltyFactor = 120.0 / 75.0

private

Parameter : The chi2 cut values distinguished by superlayer.

Definition at line 59 of file Chi2FacetFilter.h.

◆ m_penaltyWidthByISuperLayer

std::array<double, ISuperLayerUtil::c_N> m_penaltyWidthByISuperLayer {}

private

Memory for the chi2 cut values distinguished by superlayer.

Definition at line 66 of file Chi2FacetFilter.h.

◆ m_subordinaryProcessingSignalListeners

std::vector<ProcessingSignalListener*> m_subordinaryProcessingSignalListeners

privateinherited

References to subordinary signal processing listener contained in this findlet.

Definition at line 52 of file CompositeProcessingSignalListener.h.

◆ m_terminated

bool m_terminated = false

privateinherited

Flag to keep track whether termination happend before.

Definition at line 55 of file ProcessingSignalListener.h.

The documentation for this class was generated from the following files:

tracking/trackFindingCDC/filters/facet/include/Chi2FacetFilter.h
tracking/trackFindingCDC/filters/facet/src/Chi2FacetFilter.cc

Public Types

Public Member Functions

Protected Member Functions

Private Types

Private Attributes

Detailed Description

Member Typedef Documentation

◆ Interface

◆ Object

◆ Super

Constructor & Destructor Documentation

◆ Chi2FacetFilter() [1/2]

◆ Chi2FacetFilter() [2/2]

Member Function Documentation

◆ addProcessingSignalListener()

◆ beginEvent()

◆ beginRun()

◆ endRun()

◆ exposeParameters()

◆ getNProcessingSignalListener()

◆ initialize()

◆ needsTruthInformation()

◆ operator()() [1/4]

◆ operator()() [2/4]

◆ operator()() [3/4]

◆ operator()() [4/4]

◆ terminate()

Member Data Documentation

◆ m_chi2CutByISuperLayer

◆ m_initialized

◆ m_initializedAs

◆ m_param_chi2CutByISuperLayer

◆ m_param_penaltyFactor

◆ m_penaltyWidthByISuperLayer

◆ m_subordinaryProcessingSignalListeners

◆ m_terminated